Precalculus: Mathematics for Calculus, 7th Edition

by
Stewart, James; Redlin, Lothar; Watson, Saleem

Published by
Brooks Cole

ISBN 10:
1305071751

ISBN 13:
978-1-30507-175-9

Chapter 1 - Section 1.1 - Real Numbers - 1.1 Exercises: 13

Answer

Associative Property of Addition

Work Step by Step

(x+2y)+3z = x+(2y+3z)
The Associative property states that when adding (or multiplying) three numbers, it doesn't matter which two get added first. Since no minus signs are involved, we can safely assume that both sides are equal if we plugin for x, y, and z. We write the answer as The Associative Property of Addition.
(a+b)+c = a+(b+c)